
\begin{table}[htb]
\caption{Robustness check: Table F1 with additional control variables}
\begin{center}
\begin{tabular}{l c c c}
\hline
 & Experiment 1 & Experiment 2 & Experiment 3 \\
\hline
Citizens                   & $1.41^{*}$       & $2.41^{*}$        & $-1.24^{*}$       \\
                           & $ [ 1.09; 1.72]$ & $ [ 2.09;  2.72]$ & $ [-1.72; -0.74]$ \\
Benefits                   &                  &                   & $4.30^{*}$        \\
                           &                  &                   & $ [ 3.86;  4.73]$ \\
Citizens $\times$ Benefits &                  &                   & $1.17^{*}$        \\
                           &                  &                   & $ [ 0.56;  1.76]$ \\
Age                        & $-0.01$          & $-0.03^{*}$       & $-0.01$           \\
                           & $ [-0.02; 0.01]$ & $ [-0.04; -0.01]$ & $ [-0.02;  0.01]$ \\
Male legislator            & $0.13$           & $0.44^{*}$        & $0.15$            \\
                           & $ [-0.22; 0.45]$ & $ [ 0.11;  0.77]$ & $ [-0.12;  0.45]$ \\
Left-right ideology        & $0.24^{*}$       & $0.27^{*}$        & $0.28^{*}$        \\
                           & $ [ 0.11; 0.36]$ & $ [ 0.14;  0.41]$ & $ [ 0.15;  0.41]$ \\
Trustee vs. delegate       & $0.46^{*}$       & $0.48^{*}$        & $0.49^{*}$        \\
                           & $ [ 0.28; 0.64]$ & $ [ 0.29;  0.66]$ & $ [ 0.34;  0.66]$ \\
Government party           & $0.34$           & $0.07$            & $0.33$            \\
                           & $ [-0.02; 0.68]$ & $ [-0.29;  0.42]$ & $ [-0.01;  0.65]$ \\
Single member districts    & $0.40$           & $0.51^{*}$        & $-0.14$           \\
                           & $ [-0.10; 0.88]$ & $ [ 0.04;  0.97]$ & $ [-0.56;  0.26]$ \\
Upper chamber              & $-0.39$          & $-0.18$           & $-0.12$           \\
                           & $ [-0.80; 0.06]$ & $ [-0.57;  0.25]$ & $ [-0.48;  0.24]$ \\
First term legislator      & $-0.04$          & $-0.11$           & $0.19$            \\
                           & $ [-0.38; 0.31]$ & $ [-0.48;  0.27]$ & $ [-0.13;  0.52]$ \\
Intercept                  & $4.40^{*}$       & $3.81^{*}$        & $2.90^{*}$        \\
                           & $ [ 3.42; 5.40]$ & $ [ 2.82;  4.67]$ & $ [ 1.99;  3.86]$ \\
\hline
N                          & $789$            & $789$             & $789$             \\
\hline
\multicolumn{4}{l}{\scriptsize{\parbox{0.85\linewidth}{$^*$ Null hypothesis value outside the 95\% confidence interval. Entries are unstandardized coefficients from a linear mixed-effect regression model. Bootstrapped confidence intervals in parentheses. Countries function as groups. Support for PTAs is captured on an 11-point scale.}}}
\end{tabular}
\label{tab:tableI1}
\end{center}
\end{table}
